Abdominal Cavity; Abnormalities; Abscess; Adnexa Uteri; Appendicitis; Carcinoma; Cholecystitis; Colic; Colitis; Colitis, Ulcerative; colonic diseases; Cysts; Diet; Diverticulitis; Diverticulum; Duodenal Obstruction; Empyema; Enteritis; Epithelial Cells; Fecal Impaction; Food Poisoning; Frank H. Netter; Gastroenteritis; Inflammation; Intestinal Obstruction; Intussusception; Leiomyoma; Liver Abscess, Amebic; Liver Abscess, Pyogenic; Lymphadenitis; Lymphatic Diseases; Meckel diverticulum; Mesenteric Lymphadenitis; Mycobacterium; Necrosis; Pain; Peptic Ulcer; Peptic Ulcer Perforation; Peritonitis; Pregnancy, Ectopic; Rupture; Rupture, Spontaneous; Salpingitis; Splenic Infarction; Stomach Neoplasms; Thrombosis; Ulcer; wounds and injuries